Spring's Property Placeholder does not work with jUnit Tests

Question

I just configured a property placeholder in my Spring configuration

<context:property-placeholder location="classpath:/config/config.properties" />

If I run the application with this config everything works fine. However if I try to run unit tests, the test fails to load the ApplicationContext because of a FileNotFoundException. This happens if I try to run the tests from Eclipse as well as when running the test via maven.

I also tried to configure the PropertyPlaceholderConfigurer directly with the same result.

It seems as the file is not in the classpath location, even though the test classes are annotated with

 @ContextConfiguration("classpath:/config/spring-config.xml")

the files are in the same folder and it finds the xml configuration.

I already tried to use different paths: classpath:config/config.properties and without the classpath prefix, all not working. An absolute path with the file prefix works, but thats not a good solution.

Is there a way to make the property-placeholder work with tests? One solution I already found is to override the location by providing default properties in the xml. Is there any other solution? Or am I the only one with this problem?

My test classes look kind of like this:

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:/config/spring-config.xml")
@Transactional
public class JpaImageDaoTest {
@Autowired
private ImageDataDao imageDataDao;

@Test
public void testFindById() {

    Image anImage = new Image();
    anImage.setData(new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 });

    imageDao.save(anImage);
    Image image = imageDao.findById(imageData.getId());

    assertNotNull(image);
    assertEquals(anImage, image);
}

and the context xml looks like this:

 <context:property-placeholder location="classpath:/config/config.properties" />

 <bean id="imageScalingService" class="service.image.ImageScalingService">
    <property name="maxWidth" value="${scaling.thumbnail.maxWidth}" />
    <property name="maxHeight" value="${scaling.thumbnail.maxHeight}" />
</bean>

I finally found a solution/workaround

It seems like Spring does not like to mix up XML and Java Config or at least it does not work in this case. I tested this with 4.0.9.

Instead of using an XML file in my @ContextConfiguration I referenced a Java Config class that contains a @PropertySource annotation.

@Configuration
@PropertySource("test.properties")
@ImportResource("webservices.xml")
public class TestPlaceholderConfig {

}

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = {TestPlaceholderConfig.class, WebServiceConfig.class})
public class MyTest {
}

Weird thing is that the webservices.xml also contains a bean definition for the WebServiceConfig class. However, Spring is unable to find the bean defined in the Java Config. Thus I had to add the WebServiceConfig.class to the ContextConfiguration of the test class.

Answer 1

I think if it is a maven project then properties file should be in src/test/resource/config folder. Because while running the test cases the class path for tests is src/test/resource/config. Try to put the config file in test case class path

Answer 2

In which folder is the config.properties located? If you are following the standard maven folder structure it should be in src/main/resources/config/config.properties